Study Guide

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Chapter 7.1
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Study Guide

• Source
• Campbell, N.A., Williamson, B., and Heyden, R.J.
  (2004) Biology Exploring Life. Upper Saddle
  River, New Jersey Pearson Education, Inc.,
  Chapter 4.

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Q 1 autotroph
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• A1
• autotroph organism that makes its own food

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Q 2 photosynthesis
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• A2
• photosynthesis process by which plants use the
  sun's energy to convert water and carbon dioxide
  into sugars

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Q 3 producer
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• A3
• producer organism that makes its own food
  (autotroph) and produces organic molecules that
  serve as food for other organisms in its
  ecosystem

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Q 4 heterotroph
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• A4
• heterotroph organism that obtains food by
  eating other organisms

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Q 5 consumer

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• A5
• consumer organism that obtains food by eating
  producers (autotrophs) or other consumers

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Q6 cellular respiration
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• A6
• cellular respiration chemical process that uses
  oxygen to convert chemical energy stored in
  organic molecules into ATP (adenosine
  triphosphate)

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Q 7 Define autotroph and heterotroph, and give
an example of each.
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• A7
• An autotroph produces its own food.
• EXAMPLE tree
• A heterotroph obtains food by eating another
  organism.
• EXAMPLE tree

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Q 8Explain the role of food (glucose) in both
photosynthesis and cellular respiration.
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• A8
• Glucose is a product of photosynthesis and an
  ingredient in cellular respiration.

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Q 9 Explain how life on Earth depends on the
sun.
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• A9
• Most producers use the suns energy to perform
  photosynthesis. Both producers and consumers rely
  on the products of photosynthesis for food.

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Q 10How does an autograph differ from a
heterograph?
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• A10
• Autotrophs are producers because they make the
  organic molecules that serve as food for other
  organisms.
• Organisms that cannot make their own food, such
  as animals, are heterotrophs.
• Heterotrophs are also called consumers because
  they must get their food by eating other
  organisms.

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Q 11Describe how organisms release the energy in
food.
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• A11
• Both producers and consumers release the energy
  in food through the process of cellular
  respiration. The released energy enables cells to
  produce the energy-storing molecule ATP.

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Q12What does the word heterotrophe mean?
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• A12
• Heterotrophe means other-eaters.